CVE-2026-48157Network attack vector

Reflected XSS via unescaped exception error text

Published Jun 15, 2026 · Updated Jun 15, 2026

Cross-site scripting in Slim Framework 4.4.0 through 4.15.1 allows remote attackers to execute script via crafted error text. HtmlErrorRenderer inserts HttpException title and description values into HTML error pages without escaping user-controlled content. Exploitation requires application code to pass request-derived data to setTitle() or setDescription() and a victim to open the resulting error page; default exceptions alone are not exploitable.

CVSS severity6.1
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Slim Framework 4.4.0 through 4.15.1 allows remote attackers to execute script via crafted error text. HtmlErrorRenderer inserts HttpException title and description values into HTML error pages without escaping user-controlled content. Exploitation requires application code to pass request-derived data to setTitle() or setDescription() and a victim to open the resulting error page; default exceptions alone are not exploitable.

The record

CVE
CVE-2026-48157
Published
Jun 15, 2026
Updated
Jun 15, 2026
Vendor
Slim Framework
Product
Slim Framework
Classifications
CWE-79, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 4.4.0, < 4.15.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Slim Framework · Slim Frameworkversion=>= 4.4.0, < 4.15.2

Published CVSS scores

6.1Slim FrameworkCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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